There were no aliens building anything in Egypt. The Egyptians had a different work ethic than we do. They would stay on a project, even if they knew they would never see it when it was finisned. They would work on say a pyamid for 25+ years and I'm talking about the little guys. On the tombs walls and temple walls they show you how they did things, but some people just don't look at it, so they come up with theories.